Spreader for building concrete



May 30, 1939. A. sPlEs 2,160,489

SPREADER FOR BUILDING CONCRETE WALLS Filed Sept. 29, 1937 INVENTOR.

ATTORNEY.

Patented May 30, 1939 UNITED STATES SPREADER FOR. BUILDING CONCRETE WALLS Andrew Spies, Bayside, N. Y.

Application September 29, 1937, Serial No. 166,291

1 Claim.

This invention relates to spreaders or spacers adapted to be used primarily to retain in xed spaced-apart relation the two wooden or metal walls which form the frame of a mould into which concrete is to be poured to construct a concrete wall, and the main object is to provide such members which are simple in construction and efficient in operation.

Another object of the invention is the provision of such spreader members which may be left in part in the nished concrete wall without weakening the latter, and which are provided with eflicient means for securing the metallic reinforcing grill or screen thereto so that the latter will be retained fixed in proper position.

The above and other objects will become apparent in the description below, in which characters of reference refer to like-named parts in the accompanying drawing forming a part hereof.

Referring briefly to the drawing, Figure 1 is a fragmentary perspective View, partly in section, of a concrete wall formed within the walls of the mould.

Figure 2 is a cross-sectional view taken on the line 2-2 of Figure l.

Figure 3 is a cross-sectional view taken on the line 3--3 of Figure 2.

Figure 4 is a view similar to Figure 2 but illustrating a modified form of spreader member.

Figure 5 is also a View similar to Figure 2 but illustrating another modified form of spreader member.

Figure 6 is a cross-sectional view taken on the line 6 6 of Figure 5.

Figure 7 is a view substantially similar to Figure 2 but illustrating yet another form of spreader member.

Figure 8 is an end View of a square peg which may be mounted between adjacent sections which form the outer walls of the mould to prevent lateral sliding of the sections with respect to each other. Spreaders may also be used for this purpose, set in grooves in the concrete footing or bottom foundation, to serve as keys to keep upper or side walls in correct position.

Referring in detail to the drawing, the numerals II) and II represent the two outer walls of the mould, which form a trough I2 into which the concrete I3 is to be poured to construct a Wall. The rear wall I0 of the mould is rst erected, and both walls I0 and II are usually formed of wood sections mounted one above the other. The front face of the wall I0 is then suitably marked out for the locating of the spreaders I4. If the rear wall I0 is accessible on its rear side, which is most commonly the case, the holes I5 having been previously cut therethrough, the bar or bolt I6 is inserted into the hole with one threaded end il t ereoi" projecting beyond the wall. A nut I8 on the threaded end II serves to lock that end of the bar i6 against the wall I0. After the bars I6 have thus been mounted in the rear wall I0, hollow concrete or cement spreaders I4 which are square in outer cross-section, are slipped over the bolts i6 until 10 their rear extremities lie against the wall I0. Whenever desirable, the spreader may be temporarily fastened to the rear wall Iii by nails holding the wire ends 2| thereto, until the front wall II has been built up. 15

Each spreader I4 has a tube I9 lining the central longitudinal opening therethrough, the same being preferably a metal tube or lining for the member I4. Adjacent either end of the member I4, a loop of wire 20 is embedded around the tube I9 and has its ends 2I rising through the upper portion of the member I4, these wires being twisted throughout that portion thereof which passes through the member I4. One reinforcing grill 22 is stood adjacent the rear wall I0 and the wire ends 2| of the rear wire 20 of each member I4 is twisted about the horizontal bars of the grill, to retain the member I4 in horizontal position. The forward reinforcing grill 23 is then likewise set up and the forward wire ends 2I of the members I4 are then twisted about the horizontal bars of the grill 23. Thus the rear wall I0, the spreaders I4, and the grills 22 and 23 are now in place. Finally, the front mould wall II is erected, with holes provided therein for the front threaded ends 24 of the bolts I6 to pass therethrough. The ends 24 are provided with nuts 25 which are tightened to lock the walls I0 and II in xed position with respect to each other, the distance between these walls at any point being equal to the length of the member I4. After the concrete has been poured into the trough I2 and dried, the nuts I8 and 25 are removed, the walls I0 and Il taken down, and the bolts I6 Withdrawn from the members I4. The latter, together with their linings I9, remain in the finished concrete wall and their presence there does not in any way weaken the latter. The holes left through the lining tubes I9 may be filled with cement to seal the same, or left open for any prospective attachment to the walls. In the modification shown in Figure 4, the spreaded member 26 is substantially similar to the member I4 excepting that it has no inner lining tube but instead has a screw bolt 2'I imbedded therein. The threaded end 28 of the bolt 21 is screwed into the rear wall I0. The head end 29 of the bolt 21 lies at a distance back from the front end of the member 26, leaving an opening 30 at that end, this opening having its mouth widened. When the front wall I I (not shown in Figure 4) is erected, a nail is driven therethrough into the opening 30, which nail may again be removed when the concrete has set. II'his form of spreader may well be used in construction of concrete walls whose rear side is concealed, as against an embankment.

The spreader shown in Figures and 6 comprises the hollow cement outer portion 3| Whose central opening 32 is rectangular and is adapted to have a heavy steel band 33 passed therethrough, Whose ends project beyond the walls I0 and II. Blocks 34 are loosely mounted outside each wall I0 and II, with the ends 34 of the band 33 passing through rectangular horizontal openings 35 through the blocks. Vertical openings 36 are also formed through the blocks 34 and intersect the horizontal openings 35. To lock these parts together, nails 3'I are driven down through the openings 36 and serve as Wedges to push the ends 34 of the band to one side and securely clamp the same against the sides of the block openings. The blocks and bands may then later be released by simply extracting the nails. This form of spreader may be used Where the concrete wall under construction requires no reinforcing grills, or where loose steel bars are imbedded and fastened to the spreaders with wires similar to those indicated at 2 I.

T'he form of spreader shown in Figure 7 is identical to that shown in Figure 4 with the exception that the bolt 38 is provided With a pointed nail-like rear end 39 instead of a screw end.

In Figure 8, a pair of adjacent mould sections 4I| and 4I are provided with a square or diamondshaped peg 42 passing through a complementary opening through the sections. The peg 42 obviously prevents lateral slipping of the sections with respect to each other. This may be desirable to prevent complete disalignrnent of the spreaders and the reinforcing grills prior to pouring the concrete.

Obviously, modifications in form and structure may be made without departing from the spirit and scope of the invention.

I claim:

A spreader adapted to be used in combination with a pair of spaced-apart walls forming a trough into which concrete is adapted to be poured and reinforcing grills adapted to be imbedded in the concrete, comprising an elongated member of cement or the like having a longitudinal opening passing therethrough, a tube within said member lining said opening, Wires imbedded in said member and looped around said tube, the ends of said wires being twisted and passing laterally through said member and being adapted to be secured on said grills, and removable means for locking said member and Walls together.

ANDREW SPIES. 

